gpu: Replace GpuMsg_GpuSwitched with mojom api.

content/browser/gpu/gpu_process_host.cc

Index: content/browser/gpu/gpu_process_host.cc
diff --git a/content/browser/gpu/gpu_process_host.cc b/content/browser/gpu/gpu_process_host.cc
index a0041b29b6adbb8c1d3dee50adaa0775a7d3dffc..01e81d957d46e0233a14b67d20fb5b6b860fb512 100644
--- a/content/browser/gpu/gpu_process_host.cc
+++ b/content/browser/gpu/gpu_process_host.cc
@@ -191,17 +191,6 @@ enum GPUProcessLifetimeEvent {
 // only be accessed from the IO thread.
 GpuProcessHost* g_gpu_process_hosts[GpuProcessHost::GPU_PROCESS_KIND_COUNT];
 
-void SendGpuProcessMessage(GpuProcessHost::GpuProcessKind kind,
-                           bool force_create,
-                           IPC::Message* message) {
-  GpuProcessHost* host = GpuProcessHost::Get(kind, force_create);
-  if (host) {
-    host->Send(message);
-  } else {
-    delete message;
-  }
-}
-
 void RunCallbackOnIO(GpuProcessHost::GpuProcessKind kind,
                      bool force_create,
                      const base::Callback<void(GpuProcessHost*)>& callback) {
@@ -443,20 +432,6 @@ void GpuProcessHost::GetProcessHandles(
 }
 
 // static
-void GpuProcessHost::SendOnIO(GpuProcessKind kind,
-                              bool force_create,
-                              IPC::Message* message) {
-#if !defined(OS_WIN)
-  DCHECK_NE(kind, GpuProcessHost::GPU_PROCESS_KIND_UNSANDBOXED);
-#endif
-  if (!BrowserThread::PostTask(
-          BrowserThread::IO, FROM_HERE,
-          base::Bind(&SendGpuProcessMessage, kind, force_create, message))) {
-    delete message;
-  }
-}
-
-// static
 void GpuProcessHost::CallOnIO(
     GpuProcessKind kind,
     bool force_create,